Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pathogen strains competing for the same host plant change disease dynamics

08.01.2015

The epidemics caused by coinfection of several pathogen strains in a plant population is more severe than epidemics caused by single strains.

A plant individual may be simultaneously infected by several pathogen strains, each aiming for optimal survival and reproduction. This competition may come at the cost of the well being of the host as higher host exploitation rates may increase host mortality.

However, killing the host should not be in the interest of the pathogen that requires living host tissue for survival.

Academy Research Fellow Anna-Liisa Laine working at the University of Helsinki has an explanation for this puzzling phenomenon. "Rapid host exploitation rates may be favored under coinfection where the strains are competing for the same limited resources. Strains that are playing fair lose to those most quickly exhaust the host," she says.

Anna-Liisa Laine and her research group have been studying the interaction between host plant ribwort plantain, Plantago lanceolata, and its powdery mildew pathogen across hundreds of populations. They've discovered that coinfection by several strains of the same host plant are common in the wild with more than half of the pathogen populations supporting coinfection.

Experimental work coupled with field surveys of infection show that those host populations supporting coinfection suffer more severe epidemics than those where a single pathogen strain is present. A spore trapping experiment confirmed that the change in epidemiological dynamics is explained by higher spore production rate under coinfection.

These results confirm classic predictions of how infection dynamics can fundamentally change under coinfection. The study also highlights how important it is to account for coinfection - which can be spatially and temporally variable - when designing disease prevention efforts.

"Here we find that coinfection by different strains of the same pathogen species completely change infection dynamics. These results are really just scraping the surface of how complex infection dynamics can be under coinfection. In our current work we've discovered that ribwort plantain populations in Finland contain hundreds of viruses. We're now measuring how this within host disease community affects infection dynamics for a wide range of pathogen species," says Anna-Liisa Laine.

Anna-Liisa Laine | EurekAlert!
Further information:
http://www.helsinki.fi/university/

More articles from Life Sciences:

nachricht Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH

nachricht Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>